[R] Solving a system of nonlinear equations

[Ravi Varadhan]

Hi All,

 

Here is a modification of nlsolve() that I had submitted before.  The new
version of nlsolve() has the option to generate multiple random starting
values in order to improve the chances of locating the zeros of the
nonlinear system.  The last test example in the attached file, the
Freudenstein-Roth function, shows the usefulness of the multiple random
starts.  

 

Hope this is useful,

Ravi.

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Ravi Varadhan, Ph.D.

Assistant Professor, The Center on Aging and Health

Division of Geriatric Medicine and Gerontology 

Johns Hopkins University

Ph: (410) 502-2619

Fax: (410) 614-9625

Email: rvaradhan at jhmi.edu

Webpage:  http://www.jhsph.edu/agingandhealth/People/Faculty/Varadhan.html

 

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